Crushing and grinding mill



June 29, 1937. 4 F. GROSS CRUSHING AND GRINDINGMILL Filed July 6, 1936 2 Sheets-Sheet l k bm INVENTOR Fra 72/1 Gro 35 m June 29, 1937. F. GROSS CRUSHING AND GRINDING MILL Filed July 6, 1956 2 Sheets-Sheet 2 Q m a a .n R W t m 3 55? MM 6% Q E m m m W W l Ry .m\ NI dd 1 \T/ H a M Q\ Q\ I w m m .3. h a k Q 5 .2 3 Q E AN I I/l Patented June 29, i937 entree STATES smear caries CRUSHIN G AND GRINDING llflLL Frank Gross, Colorado Springs, Colo. Applieation July 6, 1936, Serial No. 89,077

gear 25 is mounted on shaft 2! so as to engage the ring gears 8 and l.

Crushed ore is led from the original crusher to the inlets 21 in the upper grinding member ID as the grinding members 1 and iii are rotating on the shaft 4. When the rollers l3 meet the curved tops of the standards l9, the rollers are forced to ride over the tops and thereby lift the upper grinding member it so as to permit the crushed ore in the inlets 27 to flow downward between the grinding members 'i' and I6. When the rollers I8 have passed over the tops of the standards Hi, the grinding member in drops down and crushes the ore and at the same time the rotary motion of the two grinding members reduces the ore to finer particles. The intermittent vertical action combined with the rotary grinding action, facilitates the pulverizing of the ore.

The machine is actuated by a belt mounted on the pulley 24. The gear 25 being meshed with gears 8-! and mounted on shaft 2!, revolves gears 8-7 in opposite directions so that the grinding members are rotated in opposite directions.

I claim:

In a mill of the class described, the combination of a vertically disposed shaft; supports for said shaft; a lower grinding member mounted on said shaft; an upper grinding member provided with ore inlets and mounted on said shaft so as to cooperate with said lower grinding member; radially disposed arms mounted on said upper grinding member; a peripheral ring gear spaced from said lower grinding member and disposed concentrically with said shaft; arms connecting said ring gear with said lower grinding member; an internal ring gear spaced from said peripheral ring gear and secured to said radially disposed arms; a roller mounted on each radially disposed arm; a stationary cam disposed in the path of said rollers so as to cooperate with said rollers and radially disposed arms to lift said upper grinding member intermittently; a drive gear disposed between said ring gears and meshed therewith; a shaft for said drive gear; and bearings for said last named shaft.

2. A mill of the class described comprising a vertically disposed rigidly mounted shaft; a lower grinding member, having a series of spiral grooves in its grinding face, mounted on said shaft; an upper grinding member, having a series of spiral groovesin itsgrinding face and provided with ore inlets, mounted on said shaft so as to cooperate with said lower grinding mem- 5 Claims.

My invention relates ing machines,

My object is to provide a machine of this class wherein a part intermittently rises and falls and at the same time has a continuous rotary motion, the function being to crush and grind ore. Other objects will appear as the description progresses.

Figure 1 represents a plan view of my machine; Fig. 2, a vertical cross section on the line 22 in Fig. l; drawn to an enlarged scale; Fig. 3, a vertical cross section on the line 3-3 in Fig. 2; Fig. 4, a side view of the lower grinding member without the spiral grooves; Fig. 5, a top view of the lower grinding member with the spiral grooves; Fig. 6, a side view of the upper grinding member; and Fig. 7, a top View of the upper grinding member. 7

Although I show the preferred embodiment of my invention, I do not thereby limit myself to the precise form shown, but wish it understood that within the scope of what is hereinafter claimed, various changes in the details of construction may be made without departing from the spirit of the invention.

An annular plate i, provided with an annular ball race 2, is mounted on legs 3. A vertically disposed shaft 4 is disposed concentrically with annular plate I and supported by struts 5 secured to legs 3. A series of balls 6 are disposed in ball race 2 in annular plate I. A conical lower grinding member 7, provided with a bearing and a ball race, is mounted on shaft i so that the ball race is disposed on balls 5. A ring gear 3 is spaced from the lower grinding member 1, disposed concentrically therewith and secured thereto by radially disposed arms 9. A conical upper grinding member ii provided with a collar l l, is mounted on shaft 3 so that said collar cooperates with shaft l. Arms 52 extend from collar H to the main body of grinding member Ill so as to provide inlets 21 which communicate with the lower grinding member l. The lower grinding member 7 and the upper grinding member i B may be provided with spiral grooves 3! like those shown in Fig. 5 to facilitate grinding of the ore. Arms 15 extend radially from member It, each arm being provided with a yoke it. An internal ring gear I? is spaced from ring gear 8 and secured to arms l5. A roller it is mounted in each yoke IS. A curved top standard is is spaced from each leg 3 and connected thereto by a horizontal bar 253. The curved tops of standards F9 are disposed in the path of rollers IS. A vertically disposed shaft 2! is journaled in bearings 22-23. A belt pulley 24 is mounted on shaft 2!, and a to ore crushing and grindher; a peripheral ring gear spaced from said lower grinding member; bars connecting said peripheral ring gear to said lower grinding member; radially disposed arms mounted on said upper grinding member; an internal ring gear spaced from said peripheral ring gear and secured to said radially disposed arms; a roller mounted on each radially disposed arm; a series of stationary cams disposed in the path of said rollers so as to cooperate with said rollers and said radially disposed arms to lift said upper grinding member intermittently; bearings for a drive shaft; a vertically disposed drive shaft journalled in said bearings; and a drive gear mounted on said drive shaft and meshed with said ring gears.

3. In a mill of the class described, the combination of a series of legs; an annular plate, provided with an annular ball race, mounted on said legs; a vertically disposed shaft located concentrically with said annular plate; supporting means for said shaft; a plurality of anti-friction balls disposed in said ball race; a conical lower grinding member, having an annular ball race, mounted on said shaft so that the ball race in said grinding member cooperates with the antifriction balls in the first named ball race; an upper grinding member, provided with inlets, mounted on said shaft so as to cooperate with said lower grinding member; .a peripheral ring gear spaced from said lower grinding member and disposed concentrically with said shaft; bars connecting said ring gear with said lower grinding member; radially disposed arms mounted on said upper grinding member; an internal ring gear spaced from said peripheral ring gear and secured to said radially disposed arms; bearings mounted on one of said legs; a vertically disposed drive shaft journalled in said bearings; and a gear mounted on said drive shaft and meshed with said ring gears.

In a mill of the class described the combination of a series of legs; an annular plate, provided with an annular ball race, mounted on said legs; a vertically disposed shaft located concentrically with said annular plate; supports for said shaft; a plurality of anti-friction balls disposed in said ball race; a lower grinding member, having a series of spiral grooves in its grinding face and provided with a ball race, mounted on said shaft so that its ball race cooperates with said antifriction balls; an upper grinding member, having a series of spiral grooves in its grinding face and provided with inlets, mounted on said shaft so as to cooperate with said lower grinding member; a peripheral ring gear spaced from said lower grinding member and connected thereto; radially disposed arms mounted on said upper grinding member; an internal ring gear spaced from said peripheral ring gear and secured to said radially disposed arms; bearings mounted on one of said legs; a vertically disposed drive shaft journalled in said bearings; a gear mounted on said drive shaft and meshed with said ring gears; and a pulley mounted on said drive shaft.

5. In a machine of the class described the combination of a series of legs; an annular plate, provided with an annular ball race, mounted on said legs; a vertically disposed shaft located concentrically within said annular plate; supporting means for said shaft; a plurality of balls disposed in said race; a conical lower grinding member, provided with an annular ball race, mounted on said shaft so that the ball race in said grinding member cooperates with the balls in said first named ball race; an upper grinding member, provided with inlets, mounted on said shaft so as to cooperate with said lower grinding member; a peripheral ring gear spaced from said lower grinding member and disposed concentrically with said shaft; bars connecting said ring gear with said lower grinding member; radially disposed arms mounted on said upper grinding member; an internal ring gear spaced from said peripheral ring gear and secured to said radially disposed arms; a roller mounted on each radially disposed arm; a series of stationary cams disposed in the path of said rollers so as to cooperate with said rollers and radially disposed arms to lift said upper grinding member intermittently; bearings on one of said legs; a vertically disposed drive shaft journalled in said bearings; and a gear mounted on said drive shaft and meshed with said ring gears.

FRANK GROSS. 

